Court Revives Patent-Settlement Suit Against Schering

A federal-appeals court Monday provided a boost to critics of patent settlements in which branded drug makers pay generic competitors to delay their efforts to introduce generic drugs.

In a closely watched case, the Third U.S. Circuit Court of Appeals in Philadelphia revived a class-action antitrust lawsuit challenging an agreement between Merck & Co.'s Schering unit and a generic drug maker that delayed a competing generic...